Its really interesting reading about other's commutes - I am particularly interested in distances...
Some of you sure go a long way - either in terms of distance, or altitude, or both!!!

I live in the country and have to get two of my children into town to school, so most days I drive. However, whenever I can I make it work so I can bike (eg, in school holidays, I do not take the car to work).

Our house is 600' above sea level, and their school/my work is about 20-30 feet above sea level.
It is 24.5km each way.
The commute home is almost always much harder... not only am I tired and I have to climb to get home, but the prevailing wind, a westerly, makes it a headwind home as I slog up the hills.